JP2002310360A - Connecting part structure of hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting part structure of a hose which can prevent entanglement of a hose by freely rotating a connecting bolt or the connecting bolt and a connecting pipe placed in no integral condition when the connecting bolt and connecting nut are tightened for connecting each hose, and can hold air-tightness even in a condition rotating the connecting nut and the connecting pipe. SOLUTION: This structure is constituted by a connecting pipe formed with a fitting part inserted in a hose in one side to extend an air-tightness hold part in one side of the fitting part to be formed with an annular lock stepped part protruded outside in the end of the air-tightness holding part; and a connecting nut successively provided in line in staircase shape with a lock part extending in a lengthwise direction a support part formed to be inserted in an engaging hole inserting the air-tightness hold part to engage the lock stepped part in the vicinity of an inlet side of the engaging hole and an adhesion part making a packing for air-tightly holding in adhesion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of a hose, and more particularly, to a connecting portion in which a gasket for keeping airtight is tightly fitted inside a connecting nut and a portion in which a locking step of a connecting pipe is tightly fitted. The present invention relates to a hose connecting portion structure that can be separately provided to prevent the connecting nut and the hose from being integrated and prevented from rotating together when the connecting bolt is tightened by the connecting nut.

[0002]

2. Description of the Related Art Generally, a multiple hose is connected to another hose or a pipe of a machine by a connection portion.

The connecting portion of such a multiple hose will be described below with reference to FIG.

Referring to FIG. 1, a connecting portion according to the prior art has a fitting portion 320 fitted into the inner diameter of the hose 100, and an annular locking step portion 360 protruding outward at one end of the fitting portion 320. Connecting pipe 300 formed
One side is opened, a thread is formed on the inside diameter, and a connection nut 4 having a centrally formed engagement hole 420 into which the fitting portion 320 of the connection tube 300 is inserted is formed inside.
00, a packing 500 that is in close contact with one surface of the locking step 360 that is in close contact with the engagement hole 420, and a packing 500 that is fastened to the thread of the connection nut 400.
Is pressed to the locking step 360 side, and is constituted by a connection bolt 600 connected to another hose. The fitting portion 320 is connected to the hose 10 by crimping the engagement ring 200.
0 is firmly bound.

[0005] As described above, in the conventional connection portion configured to fasten the connection nut 400 and the connection bolt 600, the hoses 100 can be connected while maintaining the airtightness. However, when the connecting bolt 600 is tightened by the connecting nut 400, the end of the connecting bolt 600 strongly presses the packing 500 toward the locking step 360 side. The rotation of the bolt 600 or the connection nut 400 causes the connection pipe 300 and the hose 100 to rotate together, and thus the hose 100 is entangled. That is, the connection bolt 600
When one is strongly tightened, one end surface of the connection bolt 600 makes the packing 500 strongly adhere to the locking step portion 360,
As a result, the locking step 360 is strongly pressed against the inner surface of the connection nut 400, and the connection nut 400, the connection pipe 300, and the hose 100 are integrated. For this reason, when the connection nut 400 or the connection bolt 600 is squeezed, there is a problem that the hose 100 itself is rotated and entangled.

[0006] Due to the entanglement of the hose 100 generated at the time of fastening with the connection nut 400 or the connection bolt 600, the hose 100 is easily damaged due to torsion, and the other connection parts are loosened and airtight. There is also a problem that the performance is reduced.

[0007]

SUMMARY OF THE INVENTION The present invention has been devised to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a connecting bolt for connecting each hose. When tightening with a connection nut, a connection bolt or a connection nut and a connection pipe are not integrated, and it is to provide a hose connection part structure which can prevent the hose from being entangled by being rotatable.

It is another object of the present invention to provide a hose connecting portion structure that can maintain airtightness without the connecting nut and the connecting tube rotating together.

[0009]

In order to achieve the above object, a hose connecting portion structure according to the present invention has a fitting portion to be inserted into a hose formed on one side, and one side of the fitting portion formed on one side of the fitting portion. A connecting pipe having an airtight holding portion extending therethrough and having an annular locking step protruding outward at an end of the airtight holding portion; and an engagement hole through which the airtight holding portion is inserted is formed. A supporting portion extending in the longitudinal direction, a locking portion to which the locking step portion is engaged near the entrance side of the engaging hole, and a close contact portion to which the gasket for maintaining airtightness is stuck are provided stepwise. And a connection nut continuously provided in a shape.

[0010] At least one mounting groove is provided on the outer peripheral surface of the airtight holding portion of the connecting pipe, and each of the mounting grooves is in close contact with the inner peripheral surface of the engaging hole to maintain airtightness. Is provided.

[0011]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG.
FIG. 2 is an exploded perspective view showing a connecting structure of the hose according to the present invention, FIG. 2 is an enlarged sectional view showing a connected state of the connecting structure of the hose according to the present invention, and FIG. It is an expanded sectional view which shows the use condition of.

Referring to FIG. 1, in a hose connecting portion structure according to an embodiment of the present invention, a connecting tube 30 having an airtight holding portion 34 and a locking step portion 36 is engaged with the locking step portion 36. A connecting nut 40 in which a locking portion 48 and a contact portion 46 to which a gas-tight holding packing 50 is tightly connected are connected in a stepwise manner.
It is composed of

The connecting tube 30 has a fitting portion 32 inserted into the hose 10 on one side and a plurality of engaging projections 33. After the fitting portion 32 is inserted into the hose 10, the fitting ring 32 is firmly connected to the hose 10 by crimping of the engagement ring 20. An airtight holding portion 34 extends on one side of the fitting portion 32, and a plurality of annular mounting grooves 38 are provided in the airtight holding portion 34. The mounting groove 38
Is provided with an airtight holding ring 70. An O-ring is desirable as the hermetic holding ring 70.

The connection nut 40 is formed with a screw thread so that the connection bolt 60 is fastened to the inner diameter on the inlet side, and a support portion 44 is formed on the back surface. That is,
As shown in FIGS. 2 and 3, a bearing portion 44 having a smaller diameter than the connecting nut 40 is formed on the facing surface on the inlet side where the thread is formed. Therefore, the engagement hole 42 formed inside the connection nut 40 extends in the longitudinal direction. The engagement hole 42 is provided in the airtight holding portion 34 of the connection pipe 30.
Is formed to have an inner diameter slightly larger than the outer diameter of the hermetic holding portion 34 so as to be fitted.

On the other hand, in the vicinity of the entrance side (in the direction in which the thread is formed) of the engagement hole 42 of the connection nut 40 as described above, the locking portion 48 and the contact portion 46 are connected in a stepwise manner. Is done. The locking portion 48 includes the locking step portion 36 of the connecting pipe 30.
Is engaged with the sealing portion 46,
0 is engaged.

As described above, when the connecting pipe 30 to which the airtight holding ring 70 is connected is inserted into the engaging hole 42 from the entrance side of the connecting nut 40, the locking step portion 36 becomes the locking portion 48. , The airtight holding portion 34 is positioned inside the extending engagement hole 42, and the airtight holding ring 7 is
0 comes into close contact with the inner diameter of the engagement hole 42.

Next, the operation of the present invention having the above configuration will be described. As shown in FIG.
In a state in which the connecting pipe 30 is inserted into the engagement hole 42 of the No. 0 and the locking step 36 is engaged with the locking portion 48, the fitting portion 32 is engaged.
Is inserted into the inner diameter of the hose 10 and is connected to the hose 10 by crimping of the engagement ring 20, as shown in FIG. Engaged with the contact portion 46,
The connection bolt 60 is fastened to a thread formed on the inside diameter of the connection nut 40 on the inlet side.

As described above, the locking step 36 of the connecting pipe 30 is used.
When the connecting bolt 60 is tightened in a state in which the connecting bolt 60 is engaged with the locking portion 48, the end of the connecting bolt 60 presses the airtight holding packing 50. At this time, the gasket 50 is pressed only against the contact portion 46 of the connection nut 40. Therefore, the connecting pipe 30 is rotatable without being restricted by the connecting nut 40.

That is, even if the connection bolt 60 and the connection nut 40 are tightened, the connection pipe 30 connected to the multiple hose 10 is not restrained by the connection nut 40, and the airtight holding portion of the connection pipe 30 Since 34 is rotatably inserted into the engagement hole 42, it does not rotate together with them.

As described above, when the connection bolt 60 and the connection nut 40 are fastened to each other, even if rotation occurs, the connection pipe 30 is not rotated.
By not rotating together with the connection nut 40, the hose 10 connected to the fitting portion 32 of the connection pipe 30 does not become entangled.

When the airtight holding portion 34 is inserted into the engagement hole 42, the plurality of airtight holding rings 70 connected to the respective mounting grooves 38 of the airtight holding portion 34 The airtightness is maintained by close contact, and the connection nut 40
Even if is rotated, airtightness is maintained without falling off from the mounting groove 38 or the engagement hole 42.

[0022]

As described above, according to the hose connecting portion structure of the present invention, since the gasket for keeping the airtightness does not contact the connecting tube, the integration of the connecting nut and the connecting tube can be suppressed. Therefore, even if the connecting nut rotates to connect the hoses, the connecting pipe does not rotate, so that the hoses can be prevented from getting entangled. Further, even when the connection nut and the connection pipe are rotating, airtightness can be maintained by the airtightness holding ring.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a connecting structure of a hose according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a connection state of a connecting portion structure of the hose of FIG. 1;

FIG. 3 is an enlarged sectional view showing a use state of the hose connecting portion structure of FIG. 1;

FIG. 4 is a partially enlarged cross-sectional view showing a hose connecting portion structure according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Hose 20 Engagement ring 30 Connection pipe 32 Fitting part 33 Engagement projection 34 Airtight holding part 36 Locking step part 38 Mounting groove 40 Connection nut 42 Engagement hole 44 Support part 46 Adhesive part 48 Locking part 50 Sealing for airtightness 60 Connecting bolt 70 Airtight retaining ring

Continuation of the front page F term (reference) 3H014 DA01 DA07 3H017 BA01 3H104 JA04 JB02 KA04 KB09 LF06 LG03 LG26

Claims (2)

[Claims] 1. A fitting portion to be inserted into a hose is formed on one side, and an airtight holding portion extends on one side of the fitting portion.
A connection pipe having an annular locking step protruding outward at an end of the airtight holding portion; and a support portion formed through an engagement hole into which the airtight holding portion is inserted, extending in a longitudinal direction. In the vicinity of the entrance side of the engagement hole, a connection portion in which the locking step portion is engaged and a close contact portion to which the airtight holding packing is in close contact are connected in a stepwise manner. A connection part structure for a hose, comprising: a nut; 2. An at least one mounting groove is provided on an outer peripheral surface of an airtight holding portion of the connecting pipe, and each of the mounting grooves is in close contact with an inner peripheral surface of the engaging hole to maintain airtightness. The hose connecting portion structure according to claim 1, wherein an airtight holding ring is provided.